Siren



June 1927' w. .1. CAMMACK SIREN Original Filed Sept. 2 1925 A TTORNEY Patented June 28, 1927.

PATENT" OFFICE.

WILLIAM .I. oAMMAoK, on LOS ANGELES, CALIFORNIA.

. SIREN.

Application filed September 2, 1925, serial No. 54,020. Renewed May 20, 1927.

Hy invention relates to sirens, and has.

among its salient objects to provide an improved and eliicient siren adapted to be power operated, with means for connecting it with the power furnishing element with a minimum of apparatus and effort, and to provide means for stopping the siren by means of a brake action, with very simple and practical mechanism for setting said brake action.

ther features and advantages will appear from the following description of onepracshown mounted on a cross member, 5, in

front of the usual automobile radiator and slightly below, and the driving power is had from the engine shaft, 6, on which is mounted a driving element, 7, in the nature of a fly wheel, said shaft, 6, having an extension sleeve, 8, thereon, with spring, 9, therein, for use when it is necessary to crank the engine.

The siren includes a base or supporting casting, 10, secured to the cross member 5, by means of two U-bolts, 11, said supporting casting having a pivot bearing at 10 in which the siren proper is pivotally mounted, as will now be described.

he siren proper, as here embodied, comprises a tubular casting, 12, having the larger bell portion, 13, and having mounted therein a shaft, 1 1, with ball bearings at the opposite ends of said tubular member, 13, said bearings being designated, 15, 15. On the inner end of said shaft, 14, is a friction drive pulley or member, 16, positioned to be moved into and out of engagement with the periphery of the fly-wheel 7 in a manner hereinafter described. Said shaft is also provided on its inner end with a cuplike brake element, 17 adapted to be moved into and out of contact with a friction band, 18, fixedly mounted on the inside of the engaged members.

tubular base or supporting casting, 10, as indicated.

On the outer end of the shaft 14-, is mounted the siren fan or noise making element, 19, comprising a hollow wheel-like element having a middle partition, 19, forming two chambers therein, designated, 19 and 19, and with the edge wall provided with staggered. openings, 19 as clearly indicated in the edge view thereof in Fig. 3. The inne chamber, 19', is open around its center and in register with openings, 13 in the bell casting 13, while the outer chamber 19 is also open around its central portion, as {at 19 Mounted over said siren element 19, is an enclosure member, 20, of reduceddiameter at its outer end, whichis open. as at 21, while the. larger portion of said member 20, is provided with openings, as 22 and 23, to register with the openings, 19, from the two chambers, 19 and 19.

A sound bell, as 21-, is mounted on thebell isting 13, as indicated, and directs the can rents of air forwardly, and also the tones emanating from the revolving siren element 19,,as will be understood.

The bell casting, 13, is connected by means of a rod, 25, to a rocker arm, 26, one arm of which is connected bymeans of a link, 27,

to afoot lever, 28, pivotally 111()C.11tifl,t1$ at 29, whereby said foot lever can be rocked in either direction to push or pull on the link, 27, and thereby rock the rocker arm 2 and through the connecting rod 25, rock the bell casting, 13, and the tubular casting 12, together with the shaft, 1 1, and its parts, on the pivot 10, in the base or supporting casting 10. When said parts are rocked in one direction, the friction drive pulley or member 16 is moved into engagement with the driving-element 7, whereupon said siren is power driven at high speed because of the relative diameters of the two frictionally By rocking said parts in the other direction, the brake cup, or member 17, is moved into frictional contact with the fixed brake band, 18, and brake action is at once applied to said revolving parts and they are stopped.

Air is drawn into said siren element from behind the bell casting 13, through its openings, 3*, for the inner chamber 19", and from in front of the device, through the enclosure member 20, for the chamber 19 of the siren element 19. The air is forced out through the staggered openings, 19 in said element, and out through the openings, 22 and 23, in said enclosure member, 20, and out through the bell member 24, and forwardly, as will be clearly understood with the showing made.

Thus I have provided a practical means for operating the siren and "tor applying a brake action thereto, when it is desired to stop it. The tones produced by the siren will depend upon the chambers 19" and 19 and the quantity of air forced therethrough.

WVhile I have shown and described. in detail one form or embodiment of my invention, I am aware that changes can be made in the details thereof without departing from the spirit of the invention, and I do not, therefore, limit my invention to the showing made, except as I may be limited by the hereto appended claims.

I claim:

1. In a siren, in con'ibination, a base, a driving element with means for driving the same, a siren element revolubly mounted in said base and adapted to be driven trom said driving element, said siren element having a part adapted to be moved into and out of engagement with said driving element, a brake element lixedly mounted on said base, and a part on said siren element adapted to be moved into and out of engagement with said brake element, whereby to stop the revolving movement of said siren element.

2. In a siren, in combination with a driving element and means for driving the same, of a siren element revolubly mounted, means pivotally supporting said siren element to permit its rocking movement, a part on said siren element adapted to be moved into and out of driving engagement with said driving element as said siren element is rocked upon its support, a fixed brake element, a part on said siren element adapted to be moved into and out of engagement with said brake element as said siren element is rocked upon its support, and means for rocking said siren element at will to cause its operation or to stop its operation.

8. In a siren, in combination with a driving member, a movable supporting member, a siren revolubly mounted in said supporting member, said siren having a part adapted to be moved into and out of engagement with said driving member, said siren also having a body with two cl'iambers parti tioned from each other, said chambers having inlet openings near their central portions through their outer walls and outlet openings in their outer edge walls, whereby air is drawn into said siren from opposite directions and on opposite sides of the partition and thrown out through the edge walls, means for moving said supporting member to put said part into driving engagement with said driving member, and a brake member adapted to operate on said siren to stop the same when said movable supporting member is moved in one direction.

4. In a siren, a base casting having a brake element fixedly positioned thereon, a siren casting movably connected to said base casting and having a bell portion at its outer end, a siren body having two chambers therein with inlet openings from opposite sides, centrally thereof, and with outlet openings through their outer edge walls within said bell portion of said siren casting. a driving shaft for said siren body extended into said siren casting and having a brake element thereon adjacent the brake element on said base casting, means for moving said shaft brake element into engagement with said fixed brake element, and a driving element on said shaft for driving said siren body.

Si ned at Los Angeles, Los Angeles County, California, this 26th day of August, 1925.

WVILLIAM J. CAMMACK.

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